chore: update OpenAPI spec from monorepo (#341)

Co-authored-by: OpenRouter SDK Bot <sdk-bot@openrouter.ai>

.speakeasy/in.openapi.yaml

@@ -24635,6 +24635,31 @@ paths:
                         example: 0.0001
                         format: double
                         type: number
+                      cost_details:
+                        description: Breakdown of upstream inference costs
+                        example:
+                          upstream_inference_completions_cost: 0.0004
+                          upstream_inference_cost: null
+                          upstream_inference_prompt_cost: 0.0008
+                        nullable: true
+                        properties:
+                          upstream_inference_completions_cost:
+                            format: double
+                            type: number
+                          upstream_inference_cost:
+                            format: double
+                            nullable: true
+                            type: number
+                          upstream_inference_prompt_cost:
+                            format: double
+                            type: number
+                        required:
+                          - upstream_inference_prompt_cost
+                          - upstream_inference_completions_cost
+                        type: object
+                      is_byok:
+                        description: Whether a request was made using a Bring Your Own Key configuration
+                        type: boolean
                       prompt_tokens:
                         description: Number of tokens in the input
                         example: 8